A group of plant cells with visible Chloroplasts.

Cells are small organic pieces of matter that make up all living things. Cells are the basic unit of all structure and function in all living things. Cells contain smaller structures  inside them called organelles. There are three types of cells, Animal Cells, Plant Cells, and Bacteria Cells. They are similar in most of their properties but they differ in some ways. For example, animal and plant cells have organelles that are not present in bacteria cells.

Discovery and HistoryEdit

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Robert Hooke

Cells were first discovered 1665 when an English scientist named Robert Hooke. He first observed them while looking at a piece of cork. He decided to call them cells due to their resemblance to small rooms, otherwise known as cells. In the 1800s three German scientists, Matthias Schleiden, Theodor Schwann, and Rudolf Virchow all developed what is now called "The Cell Theory". The cell theory states that "all organisms are composed of one or more cells", "cells are the most basic unit of structure, function, and organization in all organisms", and that "all cells arise from 

Cell cycle animation

pre-existing, living cells". The cell theory is now widely accepted by modern biologists.


Different types of cells contain different different organelles, but there are five that all present in all cell types. All cells contain a cell membrane, DNA, cytoplasm, ribosomes and a cryoskeleton. The purpose of the cell membrane is to regulate what goes in and what comes out of the cell. The DNA contains genetic information that is passed on to other cells that the cell produces. The ribosomes are particles that produce protein that the cell uses. The cytoplasm is a thick liquid substance that gives the cell its shape and stores nutrients that have been dissolved. The final organelle is the cytoskeleton. It is a system of strong structures that support the cell and keep it from caving into itself.

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